package com.qdu.driver;

import com.qdu.bean.RentCarBean;
import com.qdu.mapper.MaxUsageByWindspeedMapper;
import com.qdu.reducer.MaxUsageByWindspeedReducer;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.DoubleWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

import java.io.IOException;

public class MaxUsageByWindspeedDriver {
    public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {
//        args = new String[]{"E:/input/train.txt","E:/output3"};

        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf);

        job.setJarByClass(MaxUsageByWindspeedDriver.class);

        job.setMapperClass(MaxUsageByWindspeedMapper.class);
        job.setReducerClass(MaxUsageByWindspeedReducer.class);

        job.setMapOutputKeyClass(DoubleWritable.class);
        job.setMapOutputValueClass(RentCarBean.class);

        job.setOutputKeyClass(DoubleWritable.class);
        job.setOutputValueClass(RentCarBean.class);

        FileInputFormat.setInputPaths(job, args[0]);
        Path outputPath = new Path(args[1]);
        FileSystem fs = FileSystem.get(conf);
        if(fs.exists(outputPath)){
            fs.delete(outputPath, true);
        }
        FileOutputFormat.setOutputPath(job, outputPath);

        boolean result = job.waitForCompletion(true);
        System.exit(result ? 0 : 1);
    }
}
